Zircon (U–Th)/He thermochronometry in the KTB drill hole, Germany, and its implications for bulk He diffusion kinetics in zircon

Zircon (U–Th)/He thermochronometry in the KTB drill hole, Germany, and its implications for bulk He diffusion kinetics in zircon

This study presents new down-hole zircon (U–Th)/He (ZrHe) ages, laboratory He diffusion measurements, and numerical thermal modeling of ZrHe ages from the Continental Deep Drilling Project (KTB) in Germany to investigate He diffusion kinetics in zircon in nature over geologic timescales and to test...

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Veröffentlicht in:Earth and planetary science letters 2010-06, Vol.295 (1-2), p.69-82
Hauptverfasser: Wolfe, Melissa R., Stockli, Daniel F.
Format: Artikel
Sprache:eng
Schlagworte:
(U–Th)/He thermochronology
Age
Anisotropy
Cooling
Dating
Diffusion
Earth
empirical calibration
KTB drill hole
Manufacturing engineering
Mathematical models
Zircon
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Zusammenfassung:This study presents new down-hole zircon (U–Th)/He (ZrHe) ages, laboratory He diffusion measurements, and numerical thermal modeling of ZrHe ages from the Continental Deep Drilling Project (KTB) in Germany to investigate He diffusion kinetics in zircon in nature over geologic timescales and to test to applicability of laboratory-derived He diffusion kinetics. Single-grain laser (U–Th)/He ages, calculated using standard alpha-ejection correction procedures assuming homogenous parent-nuclide distribution, display a systematic decrease in ZrHe ages from ∼112 to
ISSN:0012-821X
1385-013X
DOI:10.1016/j.epsl.2010.03.025